C11 Cush drive, nut locking..?

[scifi]

I have a 1950 C11, and was inspecting the primary chaincase, and found the nut holding the cush drive was a bit loose.   I tightened it up by punching on the castlations, but could not find any way of locking that nut in position.   
Short of putting a blob of weld on it, is there a better way of securing it..?

[scifi]

After looking at the Cush-drive, I realise that it is not adjustable,   So just tighten the nut up sufficiently, and it should not loosen.   There is no provision for a lock washer, or locking pin or wire, it just relies upon being torqued up enough.

[JulianS]

Use loctite or other thread locker.

[scifi]

Yea, I tried some of Halfords best blue thread locker, and thumped the nut up real tight.   Then adjusted the clutch springs to lift off symetrically.   A short test ride later, and all seems good to go for our next VMCC ride-out to Bala in Mid Wales.

[DAVE BRADY]

Hi,

Is the thread the same size as A10?  SRM do a cush drive nut with a hex for using a socket.

Dave.

[neil1964]

Hi,

Is the thread the same size as A10?  SRM do a cush drive nut with a hex for using a socket.

Dave.

You would need to check how much clearance you have between nut and chaincase.
I fitted one of those on a DBD and for some reason the nut 'just' caught on the ally case scoring a groove in the case. Is the C10 a tin case?

[scifi]

The C11 s a tinplate case, with about 20 small bolts holding it on.